a(n) is the smallest integer > 0 that cannot be obtained from the integers {1, ..., n} using each number at most once and the operators +, -, *, /, ^.

A071794

a(n) is the smallest integer > 0 that cannot be obtained from the integers {1, ..., n} using each number at most once and the operators +, -, *, /, ^.

Terms

    a(0) =2a(1) =4a(2) =11a(3) =34a(4) =178a(5) =926a(6) =9434

External references